If $(x - 2)^{2} + (y + 3)^{2} + (z - 15)^{2}$ = 0, then what is the value of x + y + z - 5?
1). 5
2). 9
3). 15
4). 20
What is the value of $ tan 6^{0} tan 36^{0}tan 84^{0} tan 54^{0} tan 45^{0}$?
1). $\frac{1}{2}$
2). $\frac{1}{\sqrt{2}}$
3). 1
4). $\frac{1}{3}$
PQ is the chord of a circle whose centre is O. ROS is a line segment originating from a point R on the circle that intersect PQ produced at point S such that QS = OR. If $\angle QSR$ = $30^{0}$, then what is the value (in degrees)of $\angle POR$?
1). 30
2). 45
3). 60
4). 90
The two equal sides of an isosceles triangle is 20 cm each and the third side is 30 cm. What is the area(in sq.cm) of the triangle?
1). $50\sqrt{5}$
2). 100
3). $75\sqrt{7}$
4). 175
If $Cot\theta$ =$\frac{21}{20}$, then what is the value of $Cosec\theta $?
1). $\frac{21}{29}$
2). $\frac{29}{21}$
3). $\frac{20}{29}$
4). $\frac{29}{20}$